<template>
    <div>
        <!-- 面包屑导航 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>数据统计</el-breadcrumb-item>
            <el-breadcrumb-item>数据报表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <div id="main" style="width:750px;height:400px;"></div>
        </el-card>
    </div>
</template>

<script>
    //导入echarts
    import echarts from 'echarts'
    //导入lodash
    // eslint-disable-next-line no-unused-vars
    import _ from 'lodash'

    export default {
        name: "report.vue",
        data() {
            return {
                //需要跟请求的折线图数据合并的options
                options: {
                    title: {
                        text: '用户来源'
                    },
                    tooltip: {
                        trigger: 'axis',
                        axisPointer: {
                            type: 'cross',
                            label: {
                                backgroundColor: '#E9EEF3'
                            }
                        }
                    },
                    grid: {
                        left: '3%',
                        right: '4%',
                        bottom: '3%',
                        containLabel: true
                    },
                    xAxis: [
                        {
                            boundaryGap: false
                        }
                    ],
                    yAxis: [
                        {
                            type: 'value'
                        }
                    ]
                }
            }
        },
        created() {


        },
        async mounted() {
            //在页面dom元素加载完毕之后执行的钩子函数mounted
            // 基于准备好的dom，初始化echarts实例
            var myChart = echarts.init(document.getElementById('main'));
            //准备数据和配置项
            //发送请求获取折线图数据
            const {data: res} = await this.$http.get('reports/type/1');

            if (res.meta.status !== 200) {
                return this.$message.error('获取折线图数据失败')
            }

            //合并res.data和this.options
            const result = _.merge(res.data, this.options);

            // 使用获取的数据展示图表
            myChart.setOption(result)
        },
        methods: {}
    }
</script>

<style scoped>

</style>